CN104906727A - 多用途车辆 - Google Patents

多用途车辆 Download PDF

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CN104906727A
CN104906727A CN201510037383.4A CN201510037383A CN104906727A CN 104906727 A CN104906727 A CN 104906727A CN 201510037383 A CN201510037383 A CN 201510037383A CN 104906727 A CN104906727 A CN 104906727A
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vehicle
rear axle
locking
vehicle body
hydraulic pressure
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CN104906727B (zh
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延斯·克雷默
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Iveco Magirus AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60SSERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S9/00Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
    • B60S9/02Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
    • B60S9/10Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting by fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/005Suspension locking arrangements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62Constructional features or details
    • B66C23/72Counterweights or supports for balancing lifting couples
    • B66C23/78Supports, e.g. outriggers, for mobile cranes
    • B66C23/80Supports, e.g. outriggers, for mobile cranes hydraulically actuated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/017Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their use when the vehicle is stationary, e.g. during loading, engine start-up or switch-off
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/06Characteristics of dampers, e.g. mechanical dampers
    • B60G17/08Characteristics of fluid dampers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88Safety gear
    • B66C23/90Devices for indicating or limiting lifting moment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044Working platforms suspended from booms
    • B66F11/046Working platforms suspended from booms of the telescoping type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/006Safety devices, e.g. for limiting or indicating lifting force for working platforms
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C5/00Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
    • E06C5/32Accessories, e.g. brakes on ladders
    • E06C5/36Safety devices against slipping or falling of ladders; Safety devices against overloading ladders
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C5/00Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
    • E06C5/32Accessories, e.g. brakes on ladders
    • E06C5/38Devices for blocking the springs of the vehicle; Devices for supporting the undercarriage directly from the ground
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C27/00Fire-fighting land vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/20Type of damper
    • B60G2202/24Fluid damper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40Type of actuator
    • B60G2202/41Fluid actuator
    • B60G2202/413Hydraulic actuator
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/46Means for locking the suspension
    • B60G2204/4605Means for locking the suspension hydraulically, e.g. interrupting communication between the chambers of a hydraulic cylinder
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/80Interactive suspensions; arrangement affecting more than one suspension unit
    • B60G2204/81Interactive suspensions; arrangement affecting more than one suspension unit front and rear unit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/80Interactive suspensions; arrangement affecting more than one suspension unit
    • B60G2204/83Type of interconnection
    • B60G2204/8304Type of interconnection using a fluid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2300/00Indexing codes relating to the type of vehicle
    • B60G2300/02Trucks; Load vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2300/00Indexing codes relating to the type of vehicle
    • B60G2300/06Cranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2600/00Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
    • B60G2600/02Retarders, delaying means, dead zones, threshold values, cut-off frequency, timer interruption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G9/00Resilient suspensions of a rigid axle or axle housing for two or more wheels
    • B60G9/02Resilient suspensions of a rigid axle or axle housing for two or more wheels the axle or housing being pivotally mounted on the vehicle, e.g. the pivotal axis being parallel to the longitudinal axis of the vehicle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

本发明提供了一种多用途车辆,具体地为消防车(10),包括顶起系统以及诸如能转动的梯子(12)和/或空中救援平台的能延伸的空中装置,顶起系统包括用于将车身(30)顶起的侧向地面支撑件(32、34)以及用于在车身(30)被顶起的状态下对车身的倾斜运动进行锁定的稳定装置,稳定装置包括能液压操作的后轴锁定装置(36),以用于锁定车辆(10)的后轴悬架(26)。稳定装置还包括整合到车辆(10)的前轴悬架(24)中的至少一个液压可锁止减震器(44),其中,后轴锁定装置(36)和液压可锁止减震器(44)由公共液压控制装置所控制,以在使后轴锁定装置(36)致动的同时或延迟一段时间之后锁定液压可锁止减震器(44)。

Description

多用途车辆
技术领域
本发明涉及一种多用途车辆,具体地涉及一种消防车辆,该多用途车辆包括顶起系统(jacking system)以及能延伸的空中装置(诸如能转动的梯子和/或空中救援平台)。
背景技术
当这种车辆的空中装置延伸时,重要的是使车辆固定以对抗在侧向方向上的倾斜移动。为了这个目的,提供了顶起系统,该顶起系统包括用于顶起车身的侧向地面支撑件。这些支撑件可从车身取出放到操作位置中,在该操作位置中,支撑件的端部搁置在地面上,使得车辆的重量负载置于支撑件上,并且减轻了车轴及其悬架的负载。在一些情况下,将车辆从地面完全升起,使得车轮不再与地面接触。然而,在其他情况下,以使车轮保持最小地面接触的方式将车身从轴完全充分地升起。
为了实现将车辆负载偏转到侧向地面支撑件,顶起系统包括稳定装置,该稳定装置具有后轴锁定装置以用于锁定车辆的后轴悬架。该后轴锁定装置可被液压地操作,并且该后轴锁定装置可包括例如拉动装置以用于在向上方向上对抗车身(即,对抗后轴悬架的弹簧力)而拉动后轴。在其致动状态下,在对抗车身而拉动后轴的情况下,后轴悬架被完全锁定以防止轴对抗车身产生任何相对移动。在简单和普遍的结构中,后轴锁定装置的拉动操作由将后轴与液压缸的端部连接的并且在偏转滑轮上方引导的钢索来执行。如果液压缸收回,则在向上方向上拉动后轴,如上所述。
然而,即使后轴被锁定,在空中装置的某些操作状态下,稳定装置也不能完全防止车身的倾斜移动。这是由于侧向地面支撑件布置在车辆的长度位置处。虽然后面的一对地面支撑件布置在车辆的后端部处,但前面的一对地面支撑件通常布置在前轴与后轴之间。当空中装置在车辆的前方向(即,行驶方向)上延伸(在驾驶室上方延伸)时,车辆的重心在这个方向上转移。因此,车辆的负载朝其前轴偏转,并且车辆趋于执行围绕前面的一对地面支撑件的倾斜移动,从而稍微升起车辆的后端部并且对抗前轴的前悬架的弹簧力而使驾驶室降低。在空中装置的另一个操作状态下,当空中装置在车辆的后端部上方以相反的方向延伸时,前轴悬架的弹簧力趋于促进驾驶室的升起,使得促进车辆在后面一对地面支撑件上方以相反的方向的倾斜移动。
从上文中显而易见的是,前轴悬架的常规的弹簧抑制功能在空中装置的这种操作条件下以不期望的方式促进倾斜移动。然而,没有已知的方式来停用前悬架系统。特别地,由于前轴区域中的有限结构空间和前轴结构的增大的复杂性(例如因为转向系统的限制),所以不可能以与上文描述的能液压操作的后轴锁定装置相同的方式来锁定前轴。还必须考虑到当空中装置在驾驶室上方延伸时,通过对抗车身向上拉动轴而产生的前轴完全负载(正如后轴锁定装置一样)甚至会促进车辆的前倾斜,使得不能实现期望的效果。
发明内容
因此本发明的目的在于进一步开发多用途车辆的检验系统的存在问题的稳定装置,以便甚至在空中装置在车辆的前方向以及后方向上大量延伸的操作条件下防止倾斜移动,而不会在很大程度上增加前轴悬架系统的复杂性。
这个目的由一种多用途车辆(具体地为消防车辆)而实现,该多用途车辆包括顶起系统以及能延伸的空中装置(诸如,能转动的梯子和/或空中救援平台),顶起系统包括侧向地面支撑件以及稳定装置,侧向地面支撑件用于将车身顶起,稳定装置用于在车身被顶起的状态下锁定车身的倾斜运动,稳定装置包括能液压操作的后轴锁定装置,以用于锁定多用途车辆的后轴悬架,其特征在于,稳定装置还包括整合到多用途车辆的前轴悬架中的至少一个液压可锁止减震器,其中,后轴锁定装置和液压可锁止减震器能由公共液压控制装置所控制,以在使后轴锁定装置致动的同时或延时一段时间之后锁定液压可锁止减震器。
根据本发明的多用途车辆的顶起系统的稳定装置包括整合到车辆的前轴悬架中的至少一个液压可锁止减震器。液压可锁止减震器用作锁定装置,以用于使前轴悬架未致动,即,用于防止车身的前部在前悬架的弹簧力的情况下或对抗该弹簧力而升起或下降移动。与后轴锁定装置不同,对抗车身的拉动未使前轴升起,而使前轴保持其位置。如果液压可锁止减震器被锁定,则具有前轴的前悬架用作附加的稳定装置以当空中装置在前方向上延伸时防止驾驶室的倾斜或降低移动。如果空中装置在车辆的后部上方以相反方向延伸,则前悬架的弹簧力被锁定,并且不会进一步促进在相反方向上的倾斜移动。
该液压可锁止减震器可取代整合到常规前轴悬架中的常规减震器,并且不一定将大量附加部件整合到前轴悬架的结构空间中。另一个优点是如上所述的常规后轴锁定装置和由可锁止减震器表示的前轴锁定装置两者都是能液压操作的,使得这两者都由一个液压控制装置(例如,控制阀)控制。该液压控制装置可在使后轴锁定装置致动的同时或延迟一段时间之后锁定液压可锁止减震器。这确保了液压可锁止减震器仅在后轴锁定装置处于其致动状态的情况下被锁定,即,对前轴悬架的致动进行锁定。
根据本发明的优选实施例,液压控制装置包括控制阀,该控制阀具有与液压源连通的入口、与后轴锁定装置连通的第一出口以及与液压可锁止减震器连通的至少一个第二出口。
本发明的这些和其它方面从下文所述的优选实施例中将是显而易见的,并且参考下文所述的优选实施例进行阐述。
附图说明
图1是根据本发明的作为多用途车辆的一个实施例的消防车的示意图。
具体实施方式
图中消防车辆10是根据本发明的多用途车辆的一个实例。消防车在其顶部配备有能转动的梯子12,能转动的梯子可围绕竖直轴线转动,并且能转动的梯子包括彼此可滑动地支撑的多个梯段(未示出),使得梯子12是可取出的。在图中所示的梯子12的转动位置中,梯子12可被取出以在车辆10的驾驶室14上方部分地延伸。当在相反方向上转动时,梯子12可在车辆的后方向上被取出。
车辆10通常还包括一对前轮16和一对后轮18,每对车轮16、18分别设置在前轴20和后轴22的端部处。前轴20和后轴22分别安装在前轴悬架24和后轴悬架26处。前轴悬架24和后轴悬架26中的每个允许搁置在悬架24、26上的车身30克服相应悬架24、26的弹簧力而下降或者受弹簧力的促进而升起,使得在车辆10的行驶操作期间受地面作用的负载冲击被抑制,并且传送到车身30的负载冲击受到限制。这种悬架功能对于任何不同种类的常规车辆10是众所周知的,并且不再进一步描述。其在图中的表示在很大程度上被简化。
车辆10还设置有顶起系统,以在能转动的梯子12被操作时给车辆10提供安全支座。顶起系统包括用于将车身30顶起的侧向地面支撑件32、34。在本说明书的含义中,术语“顶起”应当表示车身30的重量负载从前轴悬架24和后轴悬架26朝侧向地面支撑件32、34的重新定位,即,使前轴20和后轴22卸下负载,并且负载由地面支撑件32、34带走。在这种情况下,虽然这并不一定意味着车轮16、18完全不与地面接触,但更优选的是,车轮16、18保持最小地面接触。
存在两对侧向地面支撑件32、34,即前面的一对地面支撑件32和后面的一对地面支撑件34,前面的一对地面支撑件32位于前轴20与后轴22之间并定位在与后轴22相比更靠近前轴20的位置处,后面的一对地面支撑件34定位在车辆10的在后轴22后面的后端部处。这些地面支撑件32、34可在收回位置与取出操作位置之间移动,收回位置位于车身30处或位于车身内,在取出位置中,支撑件32、34的端部搁置在地面上以将车身30顶起。通过这种取出操作和顶起操作,车辆10的支撑区域被显著扩大,从而在救援操作期间给车辆10提供安全的支座。
顶起系统还包括稳定装置,以用于在取出能转动的梯子12时防止车身30的倾斜或侧倾移动。这些稳定装置包括后轴锁定装置36,以用于锁定车辆10的后轴悬架26。该后轴锁定装置36可液压地操作并包括液压缸38。钢索40的一个端部附接在液压缸38的端部处,而钢索的另一个端部附接至后轴26。钢索40在偏转滑轮42上方偏转。当液压缸38被收回时,钢索40被拉动以使附接至钢索40的后轴26向上升起,以便对抗车身30而对后轴进行牵拉。在车身被侧向地面支撑件32、34顶起的状态下,对抗后轴悬架26的弹簧力而执行这种牵拉作用。这具有使后轴22卸下负载并使车身30的重量负载转移到侧向地面支撑件32、34的效用。应当注意的是,在后轴锁定装置36的这种锁定操作中,后轮18未从地面完全升起,但在一定程度上保持地面接触,如上文所述。然而,后轴悬架26的弹性悬架功能以这样的方式被锁定,即,防止车身30的后部分的任何倾斜或侧倾移动。
根据本发明,稳定装置还包括整合到车辆10的前轴悬架24中的液压可锁止减震器44。该液压可锁止减震器44可取代常规减震器而作为前轴悬架24的一个元件,以抑制作用在前轴20上的负载冲击。然而,通过锁定该减震器44,这种抑制悬架功能被锁定,使得前轴20相对于车身30保持在固定位置。换言之,液压可锁止减震器44表示为前轴锁定装置。然而,与后轴锁定装置36不同,因为液压可锁止减震器44仅取代了常规减震器而不需要占用太多的空间,所以在前轴悬架24处不需要大且笨重的附加结构元件(例如,液压缸38和附加的偏转滑轮42)。
稳定装置还包括液压控制装置,该液压控制装置允许对液压可锁止减震器44和后轴锁定装置36(即,其液压缸38)进行公共控制。这些液压控制装置包括液压控制阀46,以控制液压源对后轴锁定装置36的液压缸38以及液压可锁止减震器44两者的液压分布。特别地,能够对相应元件的液压进行控制,这样使得液压可锁止减震器44在使后轴锁定装置36致动的同时或延时一段时间之后被锁定,以确保前轴悬架24仅在后轴锁定装置36被致动的情况下被锁定。更详细地,源于液压源的压力通过控制阀46而分布,这样使得液压缸38设置有待收回的操作和/或控制压力,并且同时或延迟一段时间之后,液压可锁止减震器44设置有待操作的液压控制压力,这样使得减震器44被锁定。为了这个目的,控制阀46设置有入口,该入口经由入口线路50而与液压源48连通;设置有第一出口,该第一出口经由第一出口线路52而与后轴锁定装置36连通;并且设置有第二出口,该第二出口经由第二出口线路54而与液压可锁止减震器44连通。应当注意的是,车辆10通常在车辆10的两侧(即,通常在每个前轮16处)配备有一对两个的液压可锁止减震器44,并且这些减震器44中的每个减震器将设置有经由相应第二出口线路的控制压力。
在使后轴锁定装置36致动并且使液压可锁止减震器44锁定的状态下,前轴悬架24和后轴悬架26两者均未致动。在车辆的前部,因为驾驶室14不能相对于前轴20而进行下降或升起移动,所以车辆10由未致动的前轴悬架24而被额外地稳定。因此,防止车身30当在前方向上取出能转动的梯子12时向前倾斜。相反,如果向相反方向取出能转动的梯子12,由于前轴悬架24未致动,前悬架24的弹簧力不会进一步促进车身30在相反方向上的倾斜移动。

Claims (2)

1.一种多用途车辆,具体地为消防车辆(10),所述多用途车辆包括能延伸的空中装置以及顶起系统,所述能延伸的空中装置诸如为能转动的梯子(12)和/或空中救援平台,所述顶起系统包括侧向地面支撑件(32,34)以及稳定装置,所述侧向地面支撑件用于将车身(30)顶起,所述稳定装置用于在所述车身(30)被顶起的状态下锁定所述车身(30)的倾斜运动,所述稳定装置包括能液压操作的后轴锁定装置(36),以用于锁定所述多用途车辆(10)的后轴悬架(26),其特征在于,所述稳定装置还包括整合到所述多用途车辆(10)的前轴悬架(24)中的至少一个液压可锁止减震器(44),其中,所述后轴锁定装置(36)和所述液压可锁止减震器(44)由公共液压控制装置控制,以在使所述后轴锁定装置(36)致动的同时或延时一段时间之后锁定所述液压可锁止减震器(44)。
2.根据权利要求1所述的多用途车辆,其特征在于,所述公共液压控制装置包括控制阀(46),所述控制阀具有入口、第一出口以及至少一个第二出口,所述入口与液压源(48)连通,所述第一出口与所述后轴锁定装置(36)连通,所述至少一个第二出口与所述液压可锁止减震器(44)连通。
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